From 30 to 90 days, calves' need to grow and develop the rumen, so they support their growth on grains and forages. However, so many times our weaning benchmarks are not taking into consideration stress, the changes that need to occur in the microbiome, and how much management is needed. Dr. Zimmer discusses popular benchmarks and how we can best support animals during weaning to have them continue to grow and mount an immune response during stressful times. For information or additional episodes, visit Bio-Vet.com.